Backtrace: 0: /usr/bin/X (0x10000+0x640c0) [0x740c0] 1: /lib/libpthread.so.0 (_IO_funlockfile+0x58) [0xf7c891f8] 2: /usr/lib/xorg/modules/libshadow.so (shadowRemove+0x40) [0xf76b5240] 3: /usr/lib/xorg/modules/libshadow.so (0xf76b4000+0x16e0) [0xf76b56e0] 4: /usr/bin/X (0x10000+0x132188) [0x142188] 5: /usr/bin/X (0x10000+0x15b8f8) [0x16b8f8] 6: /usr/bin/X (0x10000+0x5a460) [0x6a460] 7: /usr/bin/X (0x10000+0x1698d8) [0x1798d8] 8: /usr/bin/X (0x10000+0x138ad4) [0x148ad4] 9: /usr/bin/X (0x10000+0x6e784) [0x7e784] 10: /usr/lib/xorg/modules/drivers/fbdev_drv.so (0xf776c000+0x2db0) [0xf776edb0] 11: /usr/bin/X (0x10000+0xc2c48) [0xd2c48] 12: /usr/bin/X (0x10000+0x8249c) [0x9249c] 13: /usr/bin/X (0x10000+0x13506c) [0x14506c] 14: /usr/bin/X (0x10000+0xaa044) [0xba044] 15: /usr/bin/X (0x10000+0x175ba8) [0x185ba8] 16: /usr/bin/X (0x10000+0xa7470) [0xb7470] 17: /usr/bin/X (0x10000+0x1dda0) [0x2dda0] 18: /lib/libc.so.6 (__libc_start_main+0x110) [0xf77fc850] 19: /usr/bin/X (_start+0x2c) [0x2d6cc] Segmentation fault at address 0x18 Reproducible: Always Steps to Reproduce: 1.rebuild X 2.rebuild and/or upgrade kernel 3. Portage 2.1.7.17 (default/linux/sparc/10.0, gcc-4.3.4, glibc-2.11-r1, 2.6.31-gentoo-r6 sparc64) ================================================================= System uname: Linux-2.6.31-gentoo-r6-sparc64-sun4u-with-gentoo-2.0.1 Timestamp of tree: Wed, 17 Feb 2010 07:30:01 +0000 app-shells/bash: 4.0_p37 dev-lang/python: 2.6.4-r1, 3.1.1-r1 dev-python/pycrypto: 2.1.0_beta1 dev-util/cmake: 2.8.0-r2 sys-apps/baselayout: 2.0.1 sys-apps/openrc: 0.6.0-r1 sys-apps/sandbox: 2.1 sys-devel/autoconf: 2.13, 2.65 sys-devel/automake: 1.10.3, 1.11.1 sys-devel/binutils: 2.20 sys-devel/gcc: 4.3.4 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 2.2.6b virtual/os-headers: 2.6.30-r1 ACCEPT_KEYWORDS="sparc ~sparc" ACCEPT_LICENSE="* -@EULA" CBUILD="sparc-unknown-linux-gnu" CFLAGS="-O2 -mcpu=v9 -mtune=ultrasparc3 -pipe" CHOST="sparc-unknown-linux-gnu" CONFIG_PROTECT="/etc /usr/share/X11/xkb /usr/share/config" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -mcpu=v9 -mtune=ultrasparc3 -pipe" DISTDIR="/opt/distfiles" FEATURES="assume-digests distlocks fixpackages news parallel-fetch protect-owned sandbox sfperms strict unmerge-logs unmerge-orphans userfetch" GENTOO_MIRRORS="http://gentoo.osuosl.org/ http://distro.ibiblio.org/pub/linux/distributions/gentoo/ http://www.gtlib.gatech.edu/pub/gentoo " LANG="ru_RU.KOI8-R" LDFLAGS="-Wl,-O1" LINGUAS="ru" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/opt/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X acl alsa berkdb bzip2 cli cracklib crypt cups cxx dri fbdev fortran gcc64 gdbm gpm hal iconv kde modules mozilla mudflap ncurses nls nptl nptlonly openmp pam pcre perl pop pppd python qt3support qt4 readline reflection samba session sparc spl ssl sysfs tcpd unicode xorg zlib" ALSA_CARDS="all" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="ru" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="fbdev" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LC_ALL, MAKEOPTS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Please, rebuild xorg with debugging symbols and create new backtrace: http://www.gentoo.org/proj/en/qa/backtraces.xml Also Xorg.?.log could be also useful.
(In reply to comment #1) > Please, rebuild xorg with debugging symbols and create new backtrace: > http://www.gentoo.org/proj/en/qa/backtraces.xml > > Also Xorg.?.log could be also useful. > How to start X from gdb?
Other info that might be handy is /var/log/kdm.log to see if a KDE application is triggering something in X. Or does this error not happen on other window managers?
Please reopen if the issue still exists and you can provide the requested information.